'Lost' Spoilers: Who's Returning in 'What They Died For'?

'Lost' Spoilers: Who's Returning in 'What They Died For'?

"Across the Sea" didn't feature many familiar faces, but the penultimate episode of Lost, "What They Died For," is full of returning characters. It's also a title that promises serious answers about the major deaths in the series and possibly an explanation about the alternate universe.

Continue reading for the official episode synopsis and the guest cast for this episode of Lost.

As always, the official synopsis doesn't offer much insight. "While Locke devises a new strategy, Jack's group searches for Desmond."